assad regime inside the capital with a deadly explosion in the arab red crescent building outside the city. >> it's very clear the regime forces are being grounded down and that they are losing. >> in seeking to squash the uprising, he killed 40,000 people. president obama's top aids feel the fightg takes on a more gruesome character. >> we remain very concerned, very concern that as the opposition advances, i particular on damascus, that the regime might very well consider the use of chemical weapons. >> senior u.s. officials confirmed to fox news that syria have fully mixed an unknown quantitity of the deadly nerve agent loading it on to breakable canisters, an aerosol form to be dropped from above. in dublin, secretary of state clinton met with the russian foreign minister whose regime steadfastly defended syrias, but that changed as the russian leer, close to putin said, quot we have shared and do she the opinion that the existing government in syria has to carry out its function, but time shown this task is beyond its strength. >> it's now up to the russians to do everything possible